The contract, to deliver integrated maintenance services at two Caltex Australian refineries - Lytton in Brisbane and Kurnell in Sydney - was originally awarded to WGPSN back in 2010.

WGPSN currently has around 200 employees working across the two Caltex sites.

The contract extension starts in June 2013.

Matt Gavin, WGPSN managing director for Australia and Asia Pacific, said: "We have been able to deliver tangible maintenance performance improvements across both refineries since this contract was awarded and this extension is testament to Caltex's confidence in WGPSN.

“It also further cements our credentials as a leading industrial maintenance service provider in Australia.”

Gary Smith, general manager of refining and supply at Caltex, added: "Wood Group PSN has worked closely with Caltex to help deliver measurable improvements in reliability and has been an important partner in driving improved safety outcomes at both locations.”